Write the reactions CaCo3 → cao → ca (oh) 2 → ca (hco3) 2 → co2

CaCO3 = CaO + CO2 – calcium carbonate decomposes into calcium oxide and carbon dioxide;
CaO + H2O = Ca (OH) 2 – calcium oxide reacts with water and calcium hydroxide is formed;
Ca (OH) 2 (deficiency) + H2CO3 = Ca (HCO3) 2 + H2O – calcium hydroxide reacts with carbonic acid to form calcium bicarbonate and water;
Ca (HCO3) 2 = CaCO3 + CO2 + H2O – calcium bicarbonate decomposes into calcium carbonate, carbon dioxide and water.



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